Force-draft apparatus



May 4, 1926.

P. F. LYNN FORCE DRAFT APPARATUS l. 1925 F/G'g. I,

Filed Dec. 28

INVENTOR ATTORNEYS Patented May 4, 1926.

UNiTED s FORCE-DRAFT varmiRaros..

' Application filed December 21s,- 1925'. seriali No. 78,0115.k

To all whom it may concern: Y

y Be it known that I, PATRICK F`- LYNN, a citizen of the United States, and a resident of Pittston., in the county of Luzerne and State'of Pennsylvania, have invented a new and Improved Force-Draft Apparatus, of which the following is a full, clear,` and exact description. Y

This invention relates to force -draft apparatus and more particularly to such apparatus as applied tolocomotives, and is designed more particularly for use in a loco motive burning hard coal.

Various vattempts have been made to lire straight anthracite coal in a locomotive but all attempts,so far as I am. aware, havev Figure 1 is 'a View in longitudinall sec- A vtion through a portion of a locomotive, showing my improvements attached thereto;

Figure 2 is a view in horizontal section on the staggered line 2-2 of Figure 1;

Figure 3 is a view on a reduced scale on the line 3-3 of Figure 1.

1 represents the boiler and 2 the fire box of a locomotive 3. This lire box I provide with an air-tight ash pit 4 below the grate 5, any suitable means of course being provided to permit the ashes to be dumped although I have not attempted to illustrate any structure for this purpose. v

Inside of the ash pit 4 and below the grate 5 I provide a series ofl air pipes 6 which preferably taper longitudinally or closed at their rear ends, ends project through the wall of the ash pit 4 and are .secured to or form an integral part of a manifold 7. A

These pipes 6 have upwardly projecting air discharge nozzles 8 in any desired number and extending throughout the pipes within the ash pit so as to discharge air upw'ardlythrough the grate and the coal. To.

and at their forward largerprevent ash 8 lduring the poking lof the Afire or'shaking of thesgrate, I'providecov'ering strips V9 which are fixed to a board'10 at one end ,and constitute a frame slidablymounted on bars 11 and movable by a rod 12 and arm 13 projected int-o ythe ca b14 of the locomotivev 'so that thelireman can position these stripsv 9 above or at one side of nozzles 8 as Yhe may desire. v

.The air manifold 7 has an mia pipe 15 from' falling into these nozzles` which communicates with afblower 16, and

this blower is attached to the'locomotive in any suitablemanner and is operated'by a shaft 17 supported in suitable bearingbrackcts 18 and 191depending from the locomotive'boilcr 1. A bevel pinion 20 onshaft 17 isadapted to'fmeshjwith a'bevel-pinion 21 on a shaft 22 located 1 at right angles to'.

.shaft 17"and supported in a depending hanger or bracket 23 secured to the boiler 1.-

A, and is connected by a sprocket chain 25 with a sprocket wheel 26 on one of the locomotive axles 27 so that when these pinions 20 and 21 are in mesh and the locomotive is in motion the blower will be operated through the medium of the mechanism above described to force air through the nozzles8.

28 represents a steamturbine which is secured in any approved manner to the bottom of boiler 1, and the drive shaft 29 of said turbine has a gear wheel 30 thereon meshing with a gear wheel 31 on a vclutch sprocket wheel24 is fixed to; shaft 22 member 32, this clutch member being loosev on shaft 17. to engage clutch member 32 is keyed tojslide on shaft. 17, and the hub 34 of-pinion 2O above referred to is also keyed topslide on the shaft 17, and said hub 34 is lconnected by an arm 35 with a longitudinally movable rod 36, said rod 36 beingalsol 'connected by any arm 37 with clutch member 33.

The arms 35 and 37 and the: rod 36 constitute a frame which is manually movable through themedium of any operating mechanism, not shown. The steam turbine 28 is connected by `a pipe 38 with the boiler and is provided in the cab 14 with a manually operated valve 39 to control the passage of steam to theturbine. l

When the engine lis `at rest and it is de sired to maintain a forced draft of air, the rod 36 is moved to the left of Figure 2 to move the pinion 2O out of mesh with pinion 21 and to move the clutch member 33 into A clutch member 33 adapted locked engagement with clutch member 32.

`Valve 39 is then opened and the steam will cause the turbine 28 to operate, and through the medium of the shaft 29 and gear'wheels 30 and 31 motion will bel transmitted tothe shaft 17 to operate the blower 16.

ln the pipe 15 at the outlet of theblower 16 Iv provide a. throttle valve 40 which may be manually operated to control the volume of air c lischarged from' the blower. It-will thus-be noted that when the locomotive is running, therotary movement of one ,of the axlesiwilloperate the blower and air may be discharged. throughy the several nozzles 8 and through the coal. vVVhent-he locomotive istat rest, the` turbine 28 will function to operate the blower and these parts vand mechanisms. are4 always/under manual con t-rol so that `just the desired amount of air draftsrmayf be had at all tim-es to insure an ciiicient burning of the coal.

Variousslight changes and alterations might be made in the general form'of the parts described without departing froml my inventionI and hence It do not limit myself tothe precise, details set forth but consider myself at liberty to mafke'such slightchanges and alterations asv-fairly fall' within the spirit. and scope ofthe appended claims.y

lclaimff, i

1. The combinationwith a locomotive, of

.pipes connected to: the manifold and projccting,` into the ash pit-below the grate of 'the boiler, said pipes tapering and of decreasing diameter from their air inlet to their closed inner ends, upwardly projecting air nozzles on said pipes, and a Inanually movable frame having strips thereon adapted to be positioned either above the nozzles or aty one side thereof.

2. The combination with a locomotive7 of a blower located outside of the fire boX,fan outlet manifoldv communicating' with. the blower, a series of parallel air discharge pipes connected to the manitold and. projecting' into the ash pit below the grate of the boiler, said( pipes tapering and of decreas-incy diameter from their air' inlet to their closed inner ends, upwardly projecting;l air nozzles on said pipes, a manually movable frame havinpfkstrips thereon adapted to be positioned citherabove the nozzles or at one side thereof. and means in the cab of the locomotive for manually controllingthe operation. of the frame and the power transmitting motion to the blower.

PATRICK. n LYNN. 

